1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */ 23*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */ 24*0Sstevel@tonic-gate /* All Rights Reserved */ 25*0Sstevel@tonic-gate 26*0Sstevel@tonic-gate /* 27*0Sstevel@tonic-gate * Copyright 2003 Sun Microsystems, Inc. All rights reserved. 28*0Sstevel@tonic-gate * Use is subject to license terms. 29*0Sstevel@tonic-gate */ 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate #ifndef _SYS_PIT_H 32*0Sstevel@tonic-gate #define _SYS_PIT_H 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 35*0Sstevel@tonic-gate 36*0Sstevel@tonic-gate #ifdef __cplusplus 37*0Sstevel@tonic-gate extern "C" { 38*0Sstevel@tonic-gate #endif 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gate /* Definitions for 8254 Programmable Interrupt Timer ports on AT 386 */ 41*0Sstevel@tonic-gate #define PITCTR0_PORT 0x40 /* counter 0 port */ 42*0Sstevel@tonic-gate #define PITCTR1_PORT 0x41 /* counter 1 port */ 43*0Sstevel@tonic-gate #define PITCTR2_PORT 0x42 /* counter 2 port */ 44*0Sstevel@tonic-gate #define PITCTL_PORT 0x43 /* PIT control port */ 45*0Sstevel@tonic-gate #define PITAUX_PORT 0x61 /* PIT auxiliary port */ 46*0Sstevel@tonic-gate #define SANITY_CTR0 0x48 /* sanity timer counter */ 47*0Sstevel@tonic-gate #define SANITY_CTL 0x4B /* sanity control word */ 48*0Sstevel@tonic-gate #define SANITY_CHECK 0x461 /* bit 7 set if sanity timer went off */ 49*0Sstevel@tonic-gate #define FAILSAFE_NMI 0x80 /* to test if sanity timer went off */ 50*0Sstevel@tonic-gate #define ENABLE_SANITY 0x04 /* Enables sanity clock NMI ints */ 51*0Sstevel@tonic-gate #define RESET_SANITY 0x00 /* resets sanity NMI interrupt */ 52*0Sstevel@tonic-gate 53*0Sstevel@tonic-gate /* PIT Status Byte */ 54*0Sstevel@tonic-gate 55*0Sstevel@tonic-gate #define PITSTAT_OUTPUT 7 /* OUTPUT status bit */ 56*0Sstevel@tonic-gate #define PITSTAT_NULLCNT 6 /* NULL COUNT status bit */ 57*0Sstevel@tonic-gate 58*0Sstevel@tonic-gate /* Definitions for 8254 commands */ 59*0Sstevel@tonic-gate 60*0Sstevel@tonic-gate #define PIT_READBACK 0xc0 /* read-back command */ 61*0Sstevel@tonic-gate #define PIT_READBACKC0 0x02 /* enable read-back for counter 0 */ 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate /* Following are used for Timer 0 */ 64*0Sstevel@tonic-gate #define PIT_C0 0x00 /* select counter 0 */ 65*0Sstevel@tonic-gate #define PIT_LOADMODE 0x30 /* load least significant byte */ 66*0Sstevel@tonic-gate /* followed by most significant byte */ 67*0Sstevel@tonic-gate #define PIT_NDIVMODE 0x04 /* divide by N counter */ 68*0Sstevel@tonic-gate #define PIT_SQUAREMODE 0x06 /* square-wave mode */ 69*0Sstevel@tonic-gate #define PIT_ENDSIGMODE 0x00 /* assert OUT at end-of-count mode */ 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate /* Used for Timer 1. Used for delay calculations in countdown mode */ 72*0Sstevel@tonic-gate #define PIT_C1 0x40 /* select counter 1 */ 73*0Sstevel@tonic-gate #define PIT_READMODE 0x30 /* read or load least significant */ 74*0Sstevel@tonic-gate /* byte followed by most significant */ 75*0Sstevel@tonic-gate #define PIT_RATEMODE 0x06 /* square-wave mode for USART */ 76*0Sstevel@tonic-gate 77*0Sstevel@tonic-gate 78*0Sstevel@tonic-gate #define SANITY_NUM 0xFFFF /* Sanity timer fires every .2 secs */ 79*0Sstevel@tonic-gate /* bits used in auxiliary control port for timer 2 */ 80*0Sstevel@tonic-gate #define PITAUX_GATE2 0x01 /* aux port, PIT gate 2 input */ 81*0Sstevel@tonic-gate #define PITAUX_OUT2 0x02 /* aux port, PIT clock out 2 enable */ 82*0Sstevel@tonic-gate #define PIT_HZ 1193182 /* 8254's cycles per second */ 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate #ifdef __cplusplus 85*0Sstevel@tonic-gate } 86*0Sstevel@tonic-gate #endif 87*0Sstevel@tonic-gate 88*0Sstevel@tonic-gate #endif /* _SYS_PIT_H */ 89